* Someone is investing $1.5 million to run television ads in Arkansas in support of Senate hopeful Tom Cotton (R). Who wrote the check? Apparently, we don’t know, and thanks to the Supreme Court, we probably never will – anonymous millionaires can now try to buy elections in secret, in this case, through a “social-welfare group” based in Ohio.

* It’s primary day in Texas today. Keep an eye on the Republican runoff for lieutenant governor, as well as a runoff for 91-year-old incumbent Rep. Ralph Hall (R).

* In Georgia, David Perdue may have come out ahead in the Republican Senate primary, but as he and Rep. Jack Kingston gear up for the runoff, PPP shows Kingston in the lead, 46% to 34%.

* On a related note, Rep. Paul Broun (R-Ga.), who came up far short in the Senate primary, was asked late last week whether he’d endorse Perdue or Kingston. He replied, “I’m just trying to figure out right now where my lord Jesus Christ wants me to go and what he wants me to do.”

* In Florida’s gubernatorial race, Gov. Rick Scott (R) has already spent nearly $10 million in TV ads, “an unheard-of sum so early in a campaign.” Former Gov. Charlie Crist (D) hasn’t spent any money on television advertising so far.

* The Republican National Committee sued the Federal Election Commission on Friday “in an effort to raise unlimited cash like super PACs do.”

* And as if Rep. Michael Grimm (R-N.Y.) didn’t have enough troubles, his campaign manager quit last week, reportedly because the indicted congressman doesn’t have enough money to pay staffers’ salaries.